kappa thing looks interesting. But it's on kickstarter so might ship might not, but not for at least a year, at best.
By which time there'll probably be kits coming from china :-)
Also not a single print in that video had any curves in it.
Is that a thing or are the designers simply obsessed with low poly models ?

Saw a sculpto+ working yesterday.
Interesting.
Then you think about it and it still has 4 motors. Very slow print speed, not that great a print area - have to conclude it's more of a gimmick than a viable alternative printer.
And the levelness of a rotating bed is crucial, topographical mapping is probably not going to help if it's off in any way.

It's the old adage: just because a thing can be done, does not mean it is actually worth doing.